Automatic Transaxle System -- Fail-Safe Chart |
FAIL-SAFE |
ATF (Automatic Transmission Fluid) temperature sensor:
When the ATF temperature sensor has a malfunction, 5th upshift is prohibited.Counter gear speed sensor NC (Speed sensor NC):
When the counter gear speed sensor has a malfunction, 5th upshift is prohibited.Shift solenoid valve DSL:
When the solenoid valve DSL has a malfunction, the current to the solenoid valve is stopped.
This stops lock-up control, then fuel economy decreases.Shift solenoid valve SL1, SL2, SL3 and S4:
Fail safe function:
If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid "ON" and "OFF" in order to shift into the gear positions shown in the table below.
Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops sending the current to the short circuited solenoid).
Even if starting the engine in the fail-safe mode, the gear position remains in the same position.- HINT:
- FL: Flex Lock-up
Normal Solenoid Valve SL1 ON OFF ON OFF OFF SL2 ON ON OFF FL FL SL3 OFF OFF OFF ON ON S4 OFF OFF OFF OFF ON Gear Position 1st 2nd 3rd 4th 5th SL1 Malfunction
(During driving at 1st or 2nd)Solenoid Valve SL1 OFF SL2 ON ON OFF to ON FL to ON FL to ON SL3 OFF OFF OFF ON to OFF ON to OFF S4 OFF OFF OFF OFF ON to OFF Gear Position 1st to 2nd 2nd 3rd to 2nd 4th to 2nd 5th to 2nd SL1 Malfunction
(During driving at 3rd)Solenoid Valve SL1 OFF SL2 ON to FL ON to FL OFF to FL FL FL SL3 OFF OFF OFF ON to OFF ON to OFF S4 OFF to ON OFF to ON OFF to ON OFF to ON ON Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th to 4th SL1 Malfunction
(During driving at 4th or 5th)Solenoid Valve SL1 OFF SL2 ON to FL ON to FL OFF to FL FL FL SL3 OFF to ON OFF to ON OFF to ON ON ON S4 OFF OFF OFF OFF ON Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th SL2 Malfunction Solenoid Valve SL1 ON OFF to ON ON OFF to ON OFF to ON SL2 OFF SL3 OFF OFF OFF ON to OFF ON to OFF S4 OFF to ON OFF to ON OFF to ON OFF to ON ON Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th to 4th SL3 Malfunction Solenoid Valve SL1 ON OFF ON OFF to ON OFF to ON SL2 ON ON OFF FL FL SL3 OFF S4 OFF OFF OFF OFF to ON ON Gear Position 1st 2nd 3rd 4th 5th to 4th S4 Malfunction Solenoid Valve SL1 ON OFF ON OFF OFF SL2 ON ON OFF FL FL SL3 OFF OFF OFF ON ON S4 OFF Gear Position 1st 2nd 3rd 4th 5th to 4th SL1, SL2, SL3, and S4 Malfunction Solenoid Valve SL1 OFF SL2 OFF SL3 OFF S4 OFF Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th to 4th